[net-next-2.6.git] / drivers / net / hplance.c

/* hplance.c  : the  Linux/hp300/lance ethernet driver
 *
 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
 * Based on the Sun Lance driver and the NetBSD HP Lance driver
 * Uses the generic 7990.c LANCE code.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/errno.h>
/* Used for the temporal inet entries and routing */
#include <linux/socket.h>
#include <linux/route.h>
#include <linux/dio.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/pgtable.h>

#include "hplance.h"

/* We have 16834 bytes of RAM for the init block and buffers. This places
 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
 * buffers and 2 Tx buffers.
 */
#define LANCE_LOG_TX_BUFFERS 1
#define LANCE_LOG_RX_BUFFERS 3

#include "7990.h"                                 /* use generic LANCE code */

/* Our private data structure */
struct hplance_private {
	struct lance_private lance;
};

/* function prototypes... This is easy because all the grot is in the
 * generic LANCE support. All we have to support is probing for boards,
 * plus board-specific init, open and close actions. 
 * Oh, and we need to tell the generic code how to read and write LANCE registers...
 */
static int __devinit hplance_init_one(struct dio_dev *d,
				const struct dio_device_id *ent);
static void __devinit hplance_init(struct net_device *dev, 
				struct dio_dev *d);
static void __devexit hplance_remove_one(struct dio_dev *d);
static void hplance_writerap(void *priv, unsigned short value);
static void hplance_writerdp(void *priv, unsigned short value);
static unsigned short hplance_readrdp(void *priv);
static int hplance_open(struct net_device *dev);
static int hplance_close(struct net_device *dev);

static struct dio_device_id hplance_dio_tbl[] = {
	{ DIO_ID_LAN },
	{ 0 }
};

static struct dio_driver hplance_driver = {
	.name      = "hplance",
	.id_table  = hplance_dio_tbl,
	.probe     = hplance_init_one,
	.remove    = __devexit_p(hplance_remove_one),
};

/* Find all the HP Lance boards and initialise them... */
static int __devinit hplance_init_one(struct dio_dev *d,
				const struct dio_device_id *ent)
{
	struct net_device *dev;
	int err = -ENOMEM;

	dev = alloc_etherdev(sizeof(struct hplance_private));
	if (!dev)
		goto out;

	err = -EBUSY;
	if (!request_mem_region(dio_resource_start(d),
				dio_resource_len(d), d->name))
		goto out_free_netdev;

	hplance_init(dev, d);
	err = register_netdev(dev);
	if (err)
		goto out_release_mem_region;

	dio_set_drvdata(d, dev);
	return 0;

 out_release_mem_region:
	release_mem_region(dio_resource_start(d), dio_resource_len(d));
 out_free_netdev:
	free_netdev(dev);
 out:
	return err;
}

static void __devexit hplance_remove_one(struct dio_dev *d)
{
	struct net_device *dev = dio_get_drvdata(d);

	unregister_netdev(dev);
	release_mem_region(dio_resource_start(d), dio_resource_len(d));
	free_netdev(dev);
}

/* Initialise a single lance board at the given DIO device */
static void __init hplance_init(struct net_device *dev, struct dio_dev *d)
{
        unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
        struct hplance_private *lp;
        int i;
        
        printk(KERN_INFO "%s: %s; select code %d, addr", dev->name, d->name, d->scode);

        /* reset the board */
        out_8(va+DIO_IDOFF, 0xff);
        udelay(100);                              /* ariba! ariba! udelay! udelay! */

        /* Fill the dev fields */
        dev->base_addr = va;
        dev->open = &hplance_open;
        dev->stop = &hplance_close;
#ifdef CONFIG_NET_POLL_CONTROLLER
        dev->poll_controller = lance_poll;
#endif
        dev->hard_start_xmit = &lance_start_xmit;
        dev->get_stats = &lance_get_stats;
        dev->set_multicast_list = &lance_set_multicast;
        dev->dma = 0;
        
        for (i=0; i<6; i++) {
                /* The NVRAM holds our ethernet address, one nibble per byte,
                 * at bytes NVRAMOFF+1,3,5,7,9...
                 */
                dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
                        | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
                printk("%c%2.2x", i == 0 ? ' ' : ':', dev->dev_addr[i]);
        }
        
        lp = netdev_priv(dev);
        lp->lance.name = (char*)d->name;                /* discards const, shut up gcc */
        lp->lance.base = va;
        lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */
        lp->lance.lance_init_block = 0;                 /* LANCE addr of same RAM */
        lp->lance.busmaster_regval = LE_C3_BSWP;        /* we're bigendian */
        lp->lance.irq = d->ipl;
        lp->lance.writerap = hplance_writerap;
        lp->lance.writerdp = hplance_writerdp;
        lp->lance.readrdp = hplance_readrdp;
        lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
        lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
        lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
        lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
	printk(", irq %d\n", lp->lance.irq);
}

/* This is disgusting. We have to check the DIO status register for ack every
 * time we read or write the LANCE registers.
 */
static void hplance_writerap(void *priv, unsigned short value)
{
	struct lance_private *lp = (struct lance_private *)priv;
	do {
		out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
}

static void hplance_writerdp(void *priv, unsigned short value)
{
	struct lance_private *lp = (struct lance_private *)priv;
	do {
		out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
}

static unsigned short hplance_readrdp(void *priv)
{
	struct lance_private *lp = (struct lance_private *)priv;
	__u16 value;
	do {
		value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	return value;
}

static int hplance_open(struct net_device *dev)
{
        int status;
        struct lance_private *lp = netdev_priv(dev);
        
        status = lance_open(dev);                 /* call generic lance open code */
        if (status)
                return status;
        /* enable interrupts at board level. */
        out_8(lp->base + HPLANCE_STATUS, LE_IE);

        return 0;
}

static int hplance_close(struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);

        out_8(lp->base + HPLANCE_STATUS, 0);	/* disable interrupts at boardlevel */
        lance_close(dev);
        return 0;
}

int __init hplance_init_module(void)
{
	return dio_module_init(&hplance_driver);
}

void __exit hplance_cleanup_module(void)
{
        dio_unregister_driver(&hplance_driver);
}

module_init(hplance_init_module);
module_exit(hplance_cleanup_module);

MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/* hplance.c : the Linux/hp300/lance ethernet driver
	2	*
	3	* Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
	4	* Based on the Sun Lance driver and the NetBSD HP Lance driver
	5	* Uses the generic 7990.c LANCE code.
	6	*/
	7
	8	#include <linux/module.h>
	9	#include <linux/kernel.h>
	10	#include <linux/types.h>
	11	#include <linux/interrupt.h>
	12	#include <linux/ioport.h>
	13	#include <linux/slab.h>
	14	#include <linux/string.h>
	15	#include <linux/delay.h>
	16	#include <linux/init.h>
	17	#include <linux/errno.h>
	18	/* Used for the temporal inet entries and routing */
	19	#include <linux/socket.h>
	20	#include <linux/route.h>
	21	#include <linux/dio.h>
	22	#include <linux/netdevice.h>
	23	#include <linux/etherdevice.h>
	24	#include <linux/skbuff.h>
	25
	26	#include <asm/system.h>
	27	#include <asm/io.h>
	28	#include <asm/pgtable.h>
	29
	30	#include "hplance.h"
	31
	32	/* We have 16834 bytes of RAM for the init block and buffers. This places
	33	* an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
	34	* buffers and 2 Tx buffers.
	35	*/
	36	#define LANCE_LOG_TX_BUFFERS 1
	37	#define LANCE_LOG_RX_BUFFERS 3
	38
	39	#include "7990.h" /* use generic LANCE code */
	40
	41	/* Our private data structure */
	42	struct hplance_private {
	43	struct lance_private lance;
	44	};
	45
	46	/* function prototypes... This is easy because all the grot is in the
	47	* generic LANCE support. All we have to support is probing for boards,
	48	* plus board-specific init, open and close actions.
	49	* Oh, and we need to tell the generic code how to read and write LANCE registers...
	50	*/
	51	static int __devinit hplance_init_one(struct dio_dev *d,
	52	const struct dio_device_id *ent);
	53	static void __devinit hplance_init(struct net_device *dev,
	54	struct dio_dev *d);
	55	static void __devexit hplance_remove_one(struct dio_dev *d);
	56	static void hplance_writerap(void *priv, unsigned short value);
	57	static void hplance_writerdp(void *priv, unsigned short value);
	58	static unsigned short hplance_readrdp(void *priv);
	59	static int hplance_open(struct net_device *dev);
	60	static int hplance_close(struct net_device *dev);
	61
	62	static struct dio_device_id hplance_dio_tbl[] = {
	63	{ DIO_ID_LAN },
	64	{ 0 }
65	};
66
67	static struct dio_driver hplance_driver = {
68	.name = "hplance",
69	.id_table = hplance_dio_tbl,
70	.probe = hplance_init_one,
71	.remove = __devexit_p(hplance_remove_one),
72	};
73
74	/* Find all the HP Lance boards and initialise them... */
75	static int __devinit hplance_init_one(struct dio_dev *d,
76	const struct dio_device_id *ent)
77	{
78	struct net_device *dev;
79	int err = -ENOMEM;
80
81	dev = alloc_etherdev(sizeof(struct hplance_private));
82	if (!dev)
83	goto out;
84
85	err = -EBUSY;
86	if (!request_mem_region(dio_resource_start(d),
87	dio_resource_len(d), d->name))
88	goto out_free_netdev;
89
90	hplance_init(dev, d);
91	err = register_netdev(dev);
92	if (err)
93	goto out_release_mem_region;
94
95	dio_set_drvdata(d, dev);
96	return 0;
97
98	out_release_mem_region:
99	release_mem_region(dio_resource_start(d), dio_resource_len(d));
100	out_free_netdev:
101	free_netdev(dev);
102	out:
103	return err;
104	}
105
106	static void __devexit hplance_remove_one(struct dio_dev *d)
107	{
108	struct net_device *dev = dio_get_drvdata(d);
109
110	unregister_netdev(dev);
111	release_mem_region(dio_resource_start(d), dio_resource_len(d));
112	free_netdev(dev);
113	}
114
115	/* Initialise a single lance board at the given DIO device */
116	static void __init hplance_init(struct net_device dev, struct dio_dev d)
117	{
118	unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
119	struct hplance_private *lp;
120	int i;
121
122	printk(KERN_INFO "%s: %s; select code %d, addr", dev->name, d->name, d->scode);
123
124	/* reset the board */
125	out_8(va+DIO_IDOFF, 0xff);
126	udelay(100); /* ariba! ariba! udelay! udelay! */
127
128	/* Fill the dev fields */
129	dev->base_addr = va;
130	dev->open = &hplance_open;
131	dev->stop = &hplance_close;
132	#ifdef CONFIG_NET_POLL_CONTROLLER
133	dev->poll_controller = lance_poll;
134	#endif
135	dev->hard_start_xmit = &lance_start_xmit;
136	dev->get_stats = &lance_get_stats;
137	dev->set_multicast_list = &lance_set_multicast;
138	dev->dma = 0;
139
140	for (i=0; i<6; i++) {
141	/* The NVRAM holds our ethernet address, one nibble per byte,
142	* at bytes NVRAMOFF+1,3,5,7,9...
143	*/
144	dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
145	\| (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
146	printk("%c%2.2x", i == 0 ? ' ' : ':', dev->dev_addr[i]);
147	}
148
149	lp = netdev_priv(dev);
150	lp->lance.name = (char)d->name; / discards const, shut up gcc */
151	lp->lance.base = va;
152	lp->lance.init_block = (struct lance_init_block )(va + HPLANCE_MEMOFF); / CPU addr */
153	lp->lance.lance_init_block = 0; /* LANCE addr of same RAM */
154	lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
155	lp->lance.irq = d->ipl;
156	lp->lance.writerap = hplance_writerap;
157	lp->lance.writerdp = hplance_writerdp;
158	lp->lance.readrdp = hplance_readrdp;
159	lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
160	lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
161	lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
162	lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
163	printk(", irq %d\n", lp->lance.irq);
164	}
165
166	/* This is disgusting. We have to check the DIO status register for ack every
167	* time we read or write the LANCE registers.
168	*/
169	static void hplance_writerap(void *priv, unsigned short value)
170	{
171	struct lance_private lp = (struct lance_private )priv;
172	do {
173	out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
174	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
175	}
176
177	static void hplance_writerdp(void *priv, unsigned short value)
178	{
179	struct lance_private lp = (struct lance_private )priv;
180	do {
181	out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
182	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
183	}
184
185	static unsigned short hplance_readrdp(void *priv)
186	{
187	struct lance_private lp = (struct lance_private )priv;
188	__u16 value;
189	do {
190	value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
191	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
192	return value;
193	}
194
195	static int hplance_open(struct net_device *dev)
196	{
197	int status;
198	struct lance_private *lp = netdev_priv(dev);
199
200	status = lance_open(dev); /* call generic lance open code */
201	if (status)
202	return status;
203	/* enable interrupts at board level. */
204	out_8(lp->base + HPLANCE_STATUS, LE_IE);
205
206	return 0;
207	}
208
209	static int hplance_close(struct net_device *dev)
210	{
211	struct lance_private *lp = netdev_priv(dev);
212
213	out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */
214	lance_close(dev);
215	return 0;
216	}
217
218	int __init hplance_init_module(void)
219	{
220	return dio_module_init(&hplance_driver);
221	}
222
223	void __exit hplance_cleanup_module(void)
224	{
225	dio_unregister_driver(&hplance_driver);
226	}
227
228	module_init(hplance_init_module);
229	module_exit(hplance_cleanup_module);
230
231	MODULE_LICENSE("GPL");